Configuring 1:1 Nat using Firewalld for VM's
Solution 1:
NAT is done at the firewall/router level.
Depending on your firewall/router you can setup 1:1 NAT's the only thing to keep in mind is you can only setup one port to one IP.
So if you have 2 web servers one will have to run a different port (other than 80) for the NAT to work.